For anyone growing up in the early 2000s the best ARPG was probably D2. Titan Quest is the closest thing to that Masterpiece to date. This now classic has in many ways improved on the formula and to this day is still incredibly fun!
It's an incredible game that explores many features pretty unique for the genre. Definitly worth your time if you have not played it before and want to experience some very original and interesting ideas in ironically a pretty old title.